Geography of the area
The Ore Mountains form the main range of the Ore Mountain system and represent an important part of the northwestern edge of the Bohemian Massif. They extend for approximately 130 kilometres along the Czech-German border and cover a total area of about 6,000 km², of which approximately 1,600 km² lies within the Czech Republic. Above the Bohemian interior, they rise steeply towards their ridge, while on the German side they descend only gradually into Saxony. This striking difference between the two slopes is one of the most characteristic features of the mountain range. For this reason, the Ore Mountains are often compared to a massive stone wall bordering the northwestern edge of Bohemia. From a geological point of view, they are a typical example of a fault-block mountain range created by the uplift and disruption of an ancient rock massif, with an extensive levelled plateau. Due to their location and elevation, they have a colder and wetter mountain climate. In the highest areas, around 1,000 mm of precipitation falls annually, significantly influencing the character of the landscape, the formation of peat bogs and the vegetation.
The foundations of today’s Ore Mountains were created as early as the Paleozoic era during the Variscan (Hercynian) orogeny approximately 380–300 million years ago. At that time, ancient continental blocks collided, creating an extensive mountain system that covered a large part of Europe. The area of today’s Ore Mountains was exposed deep within the Earth’s crust to enormous pressures and high temperatures. Older rocks were transformed into crystalline schists, especially gneisses and mica schists, and hot granite bodies penetrated into them. It is precisely these geological processes that are connected with the later extraordinary mineralisation of the Ore Mountains – the formation of ore veins containing silver, tin, cobalt, bismuth, uranium and many other elements.
The original Paleozoic mountains were gradually worn down over hundreds of millions of years by the action of water, wind and climatic changes. A vast levelled landscape emerged from what was once a mighty mountain system. However, the present appearance of the Ore Mountains is much younger and developed mainly during the Tertiary period, approximately 40–20 million years ago. Due to Alpine mountain-building movements, which were also connected with the formation of the Alps, the ancient Bohemian Massif became tectonically active again. The Earth’s crust was broken by deep faults and individual blocks began to move.
One of these enormous crustal blocks was uplifted and tilted along the Ore Mountain Fault. Its southern edge towards Bohemia rose steeply above the area of today’s foothill basins, while the northern part gradually descends towards Germany. This gave the Ore Mountains their typical asymmetrical shape – a steep Czech slope and a broad, gently undulating plateau. The Tertiary tectonic processes were also accompanied by volcanic activity, which left visible traces in the landscape. Its remnants include, for example, the basalt hills around Boží Dar, including Špičák (1,115 m above sea level), considered the highest basalt dome in Central Europe.
The most distinctive part of the western Ore Mountains is the Klínovec Highlands, with an average elevation of around 750 metres above sea level. The highest peak of the entire mountain range is Klínovec (1,244 m above sea level), one of the landmarks of the Czech-Saxon border region. On its summit, the long-term average annual temperature reaches approximately 2.7 °C and snow cover remains there for around 150 days a year. The harsher climate, extensive mountain plateaus and long winter season created conditions not only for the development of specific natural communities, but also for winter sports and year-round tourism.
The geological structure of the Ore Mountains is exceptionally diverse. Metamorphic rocks predominate, especially gneisses and mica schists, accompanied by granites, phyllites and younger volcanic rocks. In many places, the bedrock is penetrated by metal-bearing veins and accompanied by an extraordinarily rich variety of minerals. Thanks to its geological development, the Jáchymov region ranks among the most important historical ore and mineral localities in the world. Local deposits gave rise to one of the most famous mining regions of Europe. Silver mining in the 16th century led to the foundation and prosperity of Jáchymov, the coin minted here gave its name to the world’s dollar, and later discoveries connected with uranium ores influenced the development of modern science.
On the mountain plateau about seven kilometres from Jáchymov, near the town of Boží Dar, lies the Božídarské Peat Bog National Nature Reserve, covering an area of approximately 1,160 hectares. It belongs among the most valuable natural areas of the Ore Mountains and represents the largest peat bog complex of the entire mountain range. It extends around Špičák Hill (1,115 m above sea level) and forms a unique landscape of extensive raised bogs, waterlogged mountain meadows, peat pools, ponds and remnants of original mountain forests.
The formation of the local peat bogs is closely connected with climatic conditions after the end of the last Ice Age. In the cold and wet environment of the mountain plateaus, dead plant remains accumulated for thousands of years, especially sphagnum mosses, which decomposed only very slowly due to a lack of oxygen. This created peat layers that still preserve information about the ancient appearance of the landscape and climate.
The Božídarské Peat Bog is home to rare ecosystems and provides refuge for many plant and animal species. Among animals found here is, for example, the black grouse, one of the symbols of the nature of the Ore Mountains, as well as many other mountain bird species. The area is also used by red deer and other hoofed animals. The western capercaillie, historically associated with similar mountain forests, currently no longer has a confirmed permanent breeding population here.
Among plants, species adapted to the extreme conditions of a cold, acidic and nutrient-poor environment survive here. One of the rarest is the dwarf birch, whose main distribution area lies far to the north in the tundra beyond the Arctic Circle. Other species growing here include mountain pine, bog pine, cotton grasses, cranberry and the carnivorous sundew, which compensates for the lack of nutrients in the soil by catching small insects.
Many of the local plant species are considered glacial relics – living remnants of the cold periods following the last Ice Age. The Božídarské Peat Bog therefore represents a unique natural area where conditions resembling much more northern regions of Europe have been preserved. It is not only an important nature reserve, but also a kind of archive documenting the development of the Ore Mountains landscape over the last thousands of years.
